What the X7R 0805 MLCC does in a power-supply circuit
The JMK212B7106MG-T is a 10 µF X7R MLCC rated 6.3 V in the 0805 (2012 metric) footprint — the workhorse bypass cap for SMPS input and output filtering at the board level. X7R classifies the temperature coefficient: capacitance will shift within ±15% across the full -55 to 125 °C operating window, so the 10 µF figure is the nominal rating, not a guaranteed floor. For a switching supply that relies on low impedance at the converter switching frequency, that drift stays within the filtering envelope as long as the board-level ripple budget was sized with the X7R derating curve in mind. The 6.3 V rating sits close to the working voltage in 5 V rail applications — Taiyo Yuden rates this with standard derating guidance, so for a 5 V rail the derating headroom is modest compared to a part rated at 10 V or 16 V. Confirm the peak transient on the rail stays below 6.3 V; any voltage spike above the rating degrades the dielectric over time.
Package and board-fit check
0805 (2.00 mm × 1.25 mm) with a maximum thickness of 1.35 mm — standard EIA footprint, compatible with any board designed for 0805 components. The ±20% tolerance is the commercial grade band; it meets the JEDEC tolerance letter designation for a standard X7R part. When you are validating the actual capacitance on a C-meter, budget the ±20% spread plus the temperature coefficient shift at your measurement temperature. Mounting is surface-mount, supplied on Tape & Reel — compatible with standard SMT placement equipment and reflow profiles. The base product number anchors to the JMK212B series, so any part carrying that base number shares the same 0805 footprint and voltage class.
Quoted to order through independent distribution against the BOM quantity. Lead time and lot-traceability details confirmed at RFQ — availability is not held as shelf stock through this channel.